Landsmeer is a hamlet in the Dutch province of North Holland. Anabaptists were found here at an early period. Jacob Claesz (Jacob van Wormer) and his wife Celi (Seli), executed as martyrs at Amsterdam in 1549, probably were natives of Landsmeer. In 1554-1565 Elder Leenaert Bouwens baptized here on several occasions a total of 27 persons. From then on a congregation must have existed here, which later sided with the Frisian Mennonites. Information concerning this congregation is scarce. In 1660 a member of this church, Gerrit Pieters Boon, who had been appointed sheriff of Landsmeer, was exempted from this appointment because he had religious scruples against holding a governmental office (Inv. Arch. Amst. I, No. 449). The congregation of Landsmeer in 1673, during the war, contributed some 150 guilders to the general collection of the North Holland Mennonites, which the government had asked them to organize with the aim of providing the soldiers with good clothes. At least since the end of the 17th century the congregation of Landsmeer seems to have been served by the preachers of neighboring Den Ilp. Gerrit Dirksz, preacher of Landsmeer, died in 1701. The [[Naamlijst der tegenwoordig in dienst zijnde predikanten der Mennoniten in de Vereenigde Nederlanden|Naamlijst]] of 1808 (82 f.) states that the congregation of Landsmeer no longer existed, only that of Den Ilp remaining.

Braght, Thieleman J. van. The Bloody Theatre or Martyrs' Mirror of the Defenseless Christians Who Baptized Only upon Confession of Faith and Who Suffered and Died for the Testimony of Jesus Their Saviour . . . to the Year A.D. 1660. Scottdale, PA: Herald Press, 1951: 464. Available online at: http://www.homecomers.org/mirror/index.htm.